import { Button, Badge, Table, TableBody, TableCell, TableCellLayout, TableHeader, TableHeaderCell, TableRow, Text, MessageBar, MessageBarBody, Spinner } from "@fluentui/react-components";
import { ArrowClockwiseRegular } from "@fluentui/react-icons";
import { useCommonSectionStyles } from "../../components/commonStyles";
import { useImportLog } from "../../hooks/useImportLog";
import { useBlocklistStyles } from "./blocklistStyles";
import { formatDate } from "../../utils/formatDate";

function formatUnixTimestamp(unixTs: number, timezone: string | null | undefined): string {
  return formatDate(new Date(unixTs * 1000).toISOString(), timezone);
}

export function BlocklistImportLogSection(): React.JSX.Element {
  const styles = useBlocklistStyles();
  const sectionStyles = useCommonSectionStyles();
  const { data, loading, error, page, setPage, refresh } = useImportLog(undefined, 20);

  return (
    <div className={sectionStyles.section}>
      <div className={sectionStyles.sectionHeader}>
        <Text size={500} weight="semibold">
          Import Log
        </Text>
        <Button icon={<ArrowClockwiseRegular />} appearance="secondary" onClick={refresh}>
          Refresh
        </Button>
      </div>

      {error && (
        <MessageBar intent="error">
          <MessageBarBody>{error}</MessageBarBody>
        </MessageBar>
      )}

      {loading ? (
        <div className={styles.centred}>
          <Spinner label="Loading log…" />
        </div>
      ) : !data || data.items.length === 0 ? (
        <div className={styles.centred}>
          <Text>No import runs recorded yet.</Text>
        </div>
      ) : (
        <>
          <div className={styles.tableWrapper}>
            <Table>
              <TableHeader>
                <TableRow>
                  <TableHeaderCell>Timestamp</TableHeaderCell>
                  <TableHeaderCell>Source URL</TableHeaderCell>
                  <TableHeaderCell>Imported</TableHeaderCell>
                  <TableHeaderCell>Skipped</TableHeaderCell>
                  <TableHeaderCell>Status</TableHeaderCell>
                </TableRow>
              </TableHeader>
              <TableBody>
                {data.items.map((entry) => (
                  <TableRow key={entry.id} className={entry.errors ? styles.errorRow : undefined}>
                    <TableCell>
                      <TableCellLayout>
                        <span className={styles.mono}>{formatUnixTimestamp(entry.timestamp, undefined)}</span>
                      </TableCellLayout>
                    </TableCell>
                    <TableCell>
                      <TableCellLayout>
                        <span className={styles.mono}>{entry.source_url}</span>
                      </TableCellLayout>
                    </TableCell>
                    <TableCell>
                      <TableCellLayout>{entry.ips_imported}</TableCellLayout>
                    </TableCell>
                    <TableCell>
                      <TableCellLayout>{entry.ips_skipped}</TableCellLayout>
                    </TableCell>
                    <TableCell>
                      <TableCellLayout>
                        {entry.errors ? (
                          <Badge appearance="filled" color="danger">
                            Error
                          </Badge>
                        ) : (
                          <Badge appearance="filled" color="success">
                            OK
                          </Badge>
                        )}
                      </TableCellLayout>
                    </TableCell>
                  </TableRow>
                ))}
              </TableBody>
            </Table>
          </div>

          {data.total_pages > 1 && (
            <div className={styles.pagination}>
              <Button size="small" appearance="secondary" disabled={page <= 1} onClick={() => { setPage(page - 1); }}>
                Previous
              </Button>
              <Text size={200}>
                Page {page} of {data.total_pages}
              </Text>
              <Button size="small" appearance="secondary" disabled={page >= data.total_pages} onClick={() => { setPage(page + 1); }}>
                Next
              </Button>
            </div>
          )}
        </>
      )}
    </div>
  );
}